Liquid-feed system



June 5. 1923K 1,451,758 4C. L. .STOKES LJJUID SYSTEM Original Filed July 25] 191'? atenled ,lune 5, i923.

envien sienes graisse www. w. .lll Elslliio oneens o LQUlD- FEED SYSTEM.

appiicsiiii aies my 25, i917, egli-isi in. 182,640. Renewed october ie, was. semi no. essen.

To aZZ w/'wm it may concern.'

Be it known that LCHARLES LAWRENCE S'roxss, a citizen of the United "States, residing at Los Angeles, in the county of Los Angeles and State oie. California, have invented certain new and useful improvements in Liquid-Feed Systems, of which the following is a specification.

rThis invention relates to'systeins for feeding or lifting liquids, and. particularly .to systems operated by the suction of an internal comloustion motor. y

lt is an object oi' this invention to provide iiiriproverl valve devices to be used in the o eration of the apparatus and also to provide a simpliiied construction thereof.

ln my Patent-s Nos. 1,230,537-1,230,596, and 1,239,332 issued .lune 19, 1917, l have explained and laid claims generally tomechanisin for lifting li uid fuel from a low level tank to a hi li evel reservoir to feed the carburetor ein odying admission of atmoephere to the lift line and the subsequent drawin of air into the engine intake. lt is an 'o ject of this invention to make iniprovements upon said prior devices particularly in the manner of the valve constructions.

A in such lliquid feed systems as herein described the liquid is lifted by suction to a reservoir, the suction therein being-applied intermittently and atmospheric pressure being admitted to the surface of the liquid in the reservoir during the Beriods between suction impulses so that the liquid in the reservoir may feed' by gravity to the car buretor.

It is an object of this invention to provide improved valve means for"cutting oil the application of suction and admitting atmosphere approximately at the same time to the liquid in the reservoir, and it is also an object to increase the lifting efficiency of the device by providing 'such valve means. llt is also an object to increase the-dumping or discharge eiciency oi" tle device by providiiig improved valve construction in the discharge pipe.

' Referrin lto the drawings:

Fi 1, is a section of the reservoir in detai..

Fig. 2, is a, section o the springs Yand levers along the dotted line 2--2-n suitable means.

Fig. 3, is diagram'showing tlierelative positions and connections of the dili'erent .parts of the system."

In the drawings the 1leed. tank i is shown at a lower level than the carburetor 2li, which is of the usual float `leed type, and. which is below the level of the service raser voir 3. The fuel tank l, is of the usual type used in an automobile at the rear end,

and is provided with a filler cap 27, which is open to atmosphere through the rvent 2S, This cap may' he unattached to the, ipe 2 ves so that it may slide upwardly along t e latter as it is removed or filling. A pi e or communication 2 joins the tank l Witn the reservoir 3. This pipe 2 rea/ches about to the bottoni oie. tank l. and is provided with a small air hole 29 above the liquid level in the tank l, which is supplied with air through the vent 28, which is oirelati-vely large diameter.V l do not claim anything on the filler cap construction, this bei well explained and claimed.` in my prior an co-pending applications S. N. $375,533 led June 18th, 1917, andS. N. l'l'9,62l tiled July 10th, 1917. The upper end of pipe 2 is led to a* fitting 16 in the bottom or the reservoir 3, which fitting is suitably fastened.

to the reservoir 3. The stand-pipe 35 is e.k continuation of the pipe 2, and may be part of it. The pipe '35 constitutes a guide 'for the float 7, as will he hereinafter described. The reservoir 3, contains the float and valve mechanism foi-'operation and is iittenl with a cover 13, which is suitably fastened to it so as to render it air-tight except as hereinafter provided.

A iitting 4i is fastened to the cover 13 and is suitably bored to receive a valve 6, which is freely movable therein. The valve 6 is always open to atmosphere at one end and contains an air-passage 5, which is at times closed by the wall 3D and at other times is open to atmosphere throughout. lt also has an enlarged portion 39 which engages the scat all when suction is to be out oli. The lower portion of valve 5 is encircled by a light spring` 14 and is slidalily engagedin the top of the baille plate 8, being held therein by a Cotter pin 9, or other The baffle plate 8 is firmly fixed on the top of the tube 315i which is placed in the center of the Boat T, and the sugli iie siots or orifices il mtl "l therein,

8 eiso provides means Jfor oidarms 32 sud 33 tiiic te levers for moving the il iure :mtl out of tension, uoou Pall of the float 7, one enti of 'the the si und il 'being engaged with the l. sud and tiie other euri being i5 e with the rods, 12 and wir, which .sued iuto 'the uiting si or the cover matic integral with if. l5 is u encircling the tulie 2H- auii is freely me between tlic end of lever 17 the i?? botto-"i or freut 'i'. 17 is a. lever pivoted, et

:euri connected with the discharge valve i9 to positlveiy seat the latter upon fail oi: lle iiout Y. The discharge vulve if? is of i. i eight than 'the lever :mtl is f the fitting 'which has a Valve plug Q1 containing u groove to .lve 19 aiuti (lisrimrloc'pipe e carburetor Q5.

tiiroiwii zips 22 'which muy inc fitted to the e 2i of' un iutcruzii combustion iunior u point preferably between the 'tl'irottle :uid the engine intake.

ri 'fire drawings selected for illustrutiou.

reservoir is shown iu u posiiiou where l '1.

,isciiarge luis bees competed? the lost oedown, the reservoir having; suction off to it and the ilis'eiurge faire oclug' il. "L

fue Vpssssgcs 38, an' i m me tank 'i through the i pipo ssuw through tiie s its im@ t-lic liuile S i eticcteti to tu the bottom, rvoir. The sir which passes with through the hoie 29 is carrie@ ori med iu the engine charge.

tiius liiis tiie reservoir to u v'pres ci . rise; eri point which is such tl'ietthe buoysiicy ot' the ilout Z is sufficient to overf retor the @over until the raising of the iurier ends tire levers brings tlie intermediate portions of the levers above the points of anchorage o'ltlie springs und the springs t eu temi to swing tiie outer encis of the levers downwardly insiemi of pressing them up against tiie cover. The levers thus exert su upward rather than (iowuwerd thrust to the tube 24 und the valve 6 connected thereto. it lie same time the spring 1% is iu oompressiou and the air passage 5 which lios been cioseci by the Wall 30, is now open to atmosphere throughout, und thus the reserveir is opened to atmosphere through the passage 5 und the hole 3l in the skirt of the sleeve' SO. 'llie liest being iu its upfer position the spring 15 is extended arranged to be such that it will riot toucii` tlie 'sont f 7 at any point Where the top the fiest is above the plane before reerre. to, out it will keep tlie vulve 19 closed until the Host jumps The ueiglit of the iost thus lieiug ts'keu ofi' the spring l5, the lever l? and `the valve 19, the valve i9 has sufficient Weight to 'fall und the reservoir being ogeued to atmosphere the iiquid therein passes by gravity through the pipe 23 to the carbui Upon the completion of discharge off the reserif'oir, the reverse of the above `cieseribed uctiou takes pince. The liquid being "with drown from the Hout s predetermined point is reached where the Weight o1" the fioet is such that it is suiiicient to overcome the tension of the springs i() unri l induced by the levers 32. aud the heed of the iioat, 'which in this case, is the top of bugie 8, moves ifi'oui :i point shove the plane o e. iiue cli-:Nvuthrough tile points oi' engagement eli: springs l0, 1i to u point lieiew ssici 'piene tlius csrrgfiug the- Juive 6 from its s it i0 opening the reservoir to suction. Au the same time the nir passage is closed to etuiospliere oy sli iubly engaging the Wsli 30, @ed tile weight of the float, after passing the aforesaid piane is transmitted through the spring l5, lever l? to the valve 19 which is raised to its seat 36. The spring' le is :iso extended, its purpose aud length being such that it serves to keep the valve 5 ou its seat until the head of the lozit mores pest aforesaid plane.

it will thus be apparent oui the iiiiovc description that a simpliied and improved vulve is usable performing tiro functions, that of cutting eff suction and admitting :1tmosphere to the reservoir at approximately .the same time, the action of the springs l0,

ll aiding this approximation. At the seme time the actuation of .valve 19 is aise mafie positive in its seating, it being wel?. known that suction operated vsive sometimes in seating esgpeeisiy under iow ringsum.

'sise constructies is simigieci "y using the upper end of lift pipe 2 as a guide for the float 7, and it is apparent that there can be many changes made in the detail of construction shown without interfering with the spirit of my invention; or the scope thereof as defined in the claims. Modifications will readily suggest themselves to one skilled in the art.

Having described my preferred form of invention, I claim:- r

l. In a device of the class described, a reservoir having a cover, a pipe to feed liquid thereto, a float, means to alternately open and close said reservoir to suction and atmosphere actuated by the float; and spring means to control the movement of the float, said means embodying two leve-rs engaging opposite sides of the head of the float and sprin s, each' fixed at one end to its correspon ing lever and at the other` end to anchorage fixed to said cover.

2. A vacuum fuel feed reservoir having a valve casing, carried by one wall thereof andv including a valve seat intermediate of its ends, a suction port above said seat, commumcation below said seat with the interior of said reservoir, an annular wall below said seat, a valve provided with a corresponding seat vintermediate of its ends and having a passa-ge extending lengthwise therethrough opening at one end to the atmosphere and the other end at a point below the last mentioned valve seat` afloat within said reservoir, and connections between said float and said valve for raising said valve to shut olf suction at said valve seat and raise the lower end of said passage above said annular wall or close the lower end of said passage by said annular wall and permit suction past said valve seat. A c

3. A vacuum liquid fuel reservoir, including a vertically guided float, a valve conne`cted theretov and movable 1n axial alinement therewith, sprin means connecting said float and said va'e, permitting of a limited relative axial movement and normally tending to hold'them separated to the maximum extent, and spring means tendine to lift said float., to limiting position' an compressing said first mentioned spring means to hold said valve to its seat when said float is raised past a predetermined position.

4. A li-L uid fuel feed reservoir having a valve, a float connected thereto, a pair of -levers extending in opposite directions and each having its inner end connected to said float, anda pair of springs each having one end anchored to said reservoir and the opposite end connected to the outer end of its corresponding lever, the intermediate portion of said levers being moved past the point of anchorage during a raising or lowering of the float. l

5. A liquid fuel feed reservoir having a liquid inlet pipe extending upwardl through the bottomvthereof, a float guide on said pipe, and an annular baille connected to said float and disposed above the open upper end of the inlet pi e for deflecting downwardly and outward y the liquid entering the reservoir through said ipe.

6. -A liquid fuel feed reservoir aving an inlet pipe extendin upwardly through the bottom thereof, an having an outlet at its upper end, a float slidable on said pipe and normally disposed below said outlet means connected to the upper end of the controlling the communication between said reservoir and suction or the atmosphere, and an outlet valve in the bottom of the -reservoir and controlled by the movement of the float.

7. A liquid fuel feed reservoir having a float therein, a vertically disposed guide along which said float operates, an outlet valve in the bottom of the reservoir, a coil spring encircling said guide below said'float, andl a member connected to said outlet valve and serving as a seat for said spring, for closing the vzilve upon the movement of said float toits lowermost position.

S. A liquid fuel feed reservoir having a float therein, a vertically disposed guide along which said float operates, an outlet valve in the bottom of the reservoir, a coil spring encircling said guide below said float,

and amember connected to said outlet valve and serving as a seat for said sprin for closing the valve upon the movement o said float to its lowermost position, said valve opening by gravity when said Spring is relieved of the action of said float upon the m'ovement of the latter toits uppermost position.

In testimony whereof I affix my signature in'presence of two Witnesses.

CHARLES LAWRENCE sroKEs.

Witnesses:

BELAH C. Hasn, ELLA B. THOMSON. 

